EVO6 Brembo Caliper Piston Diameter
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4piknup
master of none
Why would you deviate from the matching size master (or 1/16 bigger)?
Or are you going for duals?
Or are you going for duals?
4piknup
master of none
There is adr about pedal effort and pedal travel to be considered too.
Yep - going for duals! Given the car is track use only now, I don't need to worry about ADRs etc (makes modifying the thing sooo much easier!)
4piknup
master of none
The only input i can think of is that you need 2 masters with the same size swept volume as the standard master. this would retain pedal travel and effort close to standard.
To calculate this needs the square root of 2. (the only use of it that i know)
For a 1" cylinder:
1" /1.414 = 0.707 or nearest is 11/16"
For a 1 1/16":
Calculates to 0.751 or 3/4"...
So dual 3/4 masters is the same as a single 1 1/16" cylinder.
I think the clutch cylinders are 3/4? Or trailer brakes cylinders...
I don't know if there needs to be a separate calculation for no vacuum booster.
How do you work it out?
To calculate this needs the square root of 2. (the only use of it that i know)
For a 1" cylinder:
1" /1.414 = 0.707 or nearest is 11/16"
For a 1 1/16":
Calculates to 0.751 or 3/4"...
So dual 3/4 masters is the same as a single 1 1/16" cylinder.
I think the clutch cylinders are 3/4? Or trailer brakes cylinders...
I don't know if there needs to be a separate calculation for no vacuum booster.
How do you work it out?
consideration needs to also be taken with balance to as the stock master splits the front rear balance
I run a .625" on the front and a .700" for the rear, the smaller cylibder for the front gives more pressure to the front where you need it
I run a .625" on the front and a .700" for the rear, the smaller cylibder for the front gives more pressure to the front where you need it
Cheers mate, I really appreciate the info. Am looking at the Tilton 76 series master cylinders for my setup, they look the goods!
The issue is as above, in theory, yes you can definatley work it out, but with the ratio of the box its hard to know if you like the travel and or feel of the pedal.
I agree you could get close first up but its still a bit of a gamble.
for example those sizes that jack has kindly worked out you would have a lot of travel in the pedal. Others I have looked at on calculators are also on the larger side.
Its also working out pad frictions, weight transfer etc.... its very tricky unless you can draw from people with the same setup in very similar cars, unfortunatley not something I could find out, especially when you take into consideration weight balance (and total weight) of the car.
The sizes I have offer a very firm pedal with minimal travel (which is what I like) but I wont know if I can adjust it far enough to the front on the balance bar due to the front/rear weight balance of the car.
I agree you could get close first up but its still a bit of a gamble.
for example those sizes that jack has kindly worked out you would have a lot of travel in the pedal. Others I have looked at on calculators are also on the larger side.
Its also working out pad frictions, weight transfer etc.... its very tricky unless you can draw from people with the same setup in very similar cars, unfortunatley not something I could find out, especially when you take into consideration weight balance (and total weight) of the car.
The sizes I have offer a very firm pedal with minimal travel (which is what I like) but I wont know if I can adjust it far enough to the front on the balance bar due to the front/rear weight balance of the car.
I get you now mate. I know that I want minimal travel with a firm pedal too, the various race cars I've sat in and trialled (stationary - not driving mind you!) have all had different pedal firmness to travel ratios and I keep coming back to preferring the firmer pedal that doesn't travel so far.
Mike and Paul's MK2 Escort is pretty much spot on in terms of what I want my pedal to feel like so I guess I'm lucky to be able to draw on that.
Mike and Paul's MK2 Escort is pretty much spot on in terms of what I want my pedal to feel like so I guess I'm lucky to be able to draw on that.
other ways to work around the feel are with pad friction levels too.
in the end you should be able to guess close, but I would definatley reccomend going with cheap cylinders first until you get it right, then get the good gear.
you will get two cheapys for less than one good one
in the end you should be able to guess close, but I would definatley reccomend going with cheap cylinders first until you get it right, then get the good gear.
you will get two cheapys for less than one good one
4piknup
master of none
But dougmo, you are .7 rear which is just about what i calculated. you are roughly 10% smaller on the front. so with the bias bar centred you are roughly 5% softer and 5% more travel than stock. (if your pedal box ratios are same as stock)
But if you want more bite on the front you will need to go to a larger front cylinder. surely this would be a .7?
But if you want more bite on the front you will need to go to a larger front cylinder. surely this would be a .7?
4piknup
master of none
And no booster... damn. Need a heavy clutch to keep the leg muscles even
Your sizes would be close to a safe starting point jack, but you do want a smaller front or you will get the extra travel.
for more bite you actually need smaller at the front = More pressure with less pedal movement.
As I mentioned earlier you dont really want the same front to rear but thats hard to work out until you get the car out with the setup.
for more bite you actually need smaller at the front = More pressure with less pedal movement.
As I mentioned earlier you dont really want the same front to rear but thats hard to work out until you get the car out with the setup.
4piknup
master of none
Mmm. something is wrong with my logic brain...
Cheers dougmo. you are always informative.
Cheers dougmo. you are always informative.
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